Hi @cinnamondolce ,
This [https://www.youtube.com/watch?v=-zR_m4YVTxs|video] may be of some help to you.
It shows the complete dis-assembly of your model laptop.
Unfortunately the colour of the screws cannot be seen. The only "single" screw shown being removed is at 2:58 minutes into the video. This screw is used to hold in the WiFi card.
If this is not the one, perhaps when viewing the video it may give you some ideas of where to look for the missing screw "hole".
Hopefully this is of some help.